I was a bit sceptical when buying this but I thought it was worth a shot as I had been constantly ill the last year. I suffered through strep throat three times in six months and I had the flu about as many times in the same amount of time. My immune system was in really bad shape and the antibiotics I had been taking didn't exactly help in strengthening it.
So I tried this product out, fully expecting it to not help me whatsoever. However, I was very pleasantly surprised. I've been taking one vcap a day for about nine months and I haven't been sick once. It sounds too good to be true, but it's not! I will continue buying this product for as long as iherb stocks it, that's for sure.

I suffer from ME which basically means my immune system is shot to pieces, I have T cell and B cell abnormalities and am EBV and HHV6 positive plus I get recurring Shingles. I use the Immune Renew and it helps to diminish that 'viral' flu like feeling that occurs with ME and it's associated viruses. I highly recommend for anyone who has viral problems and recurring illnesses.

A stroke of good fortune lead me to discovering that the Lion's mane in this supplement was why I hadn't been sleeping well for 2 weeks.
Your mileage may vary of course, most people posting here seem to do well on it.

if you have recurring infections of the skin or colds, this mushroom combo is an easy and inexpensive way to boost the immune system. It has worked very well for me and is much cheaper than a multi-level marketing vitamin which touts all the same benefits

This is a great product. It is in my arsenal of cold/flu prevention because I don't like to take echinacea for longer than 2 or 3 weeks at a time. Although I've been around a lot of kids and germs, I've managed so far to avoid getting any of their colds or flus.